Condenser and mold for carbon dioxid.



W..J. FLEMMING.

CONDENSER AND MOLD FOR CARBON DIOXID.

APPLIGATION IILED AUG. 23, 1909.

955,454, Patented Apr. 19, 1910.

a J (Z5 hi L v 1W a, ll I a a (l 1 62 a 6 5 C" I C E QM' WILLIAM JAMESFLEMMING, OF RICHMOND HILL, NEW YORK.

CONDENSER AND MOLD FOR CARBON DIOXID.

Specification of Letters Patent. "Patented Apr. 19, 1910.

Application filed August 23, 1909. Serial No. 514,241.

To all whom it concern:

Be it known that 1, WILLIAM J. FLEM- MING, of Rich'mondHill, in thecounty of Queens and State of New York, have invented certain new anduseful Improvements in Condensers and Molds for Carbon Dioxid; and Ihereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,which form part of this specification.

Thisinvention is a novel device for condensing carbon dioxid gas as itescapes from a liquid carbon dioxid container, and molding same intopencils or sticks that can be conveniently used in dental and surgicaloperations for producing local anesthesia, the removal of superficialepitheliomata, and skin diseases, and in various operations in thetreatment of diseases.

The apparatus comprises a novel device which can be readily attached tothe outlet of the tanks or containers which are commonly employed incommerce for shipping liquefied carbon dioxid; the gas permitted toescape from such a container through this ap aratus isprecipitatedtherein in the form of crystals which can be packed in the shape ofsticks or pencils and which can be readily removed for use.

I term the device a carbon dioxid condenser and mold and will nowdescribe the same with reference to the accom anying drawings in whichone practical orm of the apparatus is illustrated.

In said drawings, Figure l is a side view of the device attached to acarbondioxid container. Fig. 2 is an enlarged sectional view of Fig. 1.Fig. 3 is a cross section on line 33,.Fig. .2. I

The device comprises a cylinder (1 provided with a series ofperforations or vent holes a, and has an internally threaded flange b onone end adapted to be screwed onto the out let f of a carbon dioxidflask or container F such as is commonly used for transporta-.

tion of liquefied carbon dioxid. The other end of cylinder (1 is closedby a cap 0 which may be screwed thereon as shown, and is provided withan axial passage-for a stem cl connected to a plunger d in the cylinder;which plunger preferably has a conical recess d in its inner end. Thestem d is preferably provided with graduating marks, as shown, so thatthe position to which the plunger 03 is adjusted, and the distance ofthe plunger from the flanged end I) of the cylinder, can be easilydetermined, so'that sticks of crystallized carbon dioxid of anydesiredlengthmay be produced.

The stem may be provided with a hand piece d on its outer end'whereby itcan be conveniently manipulated. The stem can be fastened in anyposition to which it is adjusted by means of a thumb-screw c tappedthrough a radial threaded hole in the cap 0.

In one practical construction of the device I preferably make thecylinder (1 of steel inside and threaded to fit the diameter of theoutlet nipple f of the ordinary commercial tank F; and the plu'nger orpiston d is preferably of brass. The size of the cylinders may of coursebe varied to produce sticks of carbon dioxid of any desired size. Whenthe cylinders are enlarged the number of holes a should be increased.The objectofvthese holes is, as hereinafter explained,

to permit the escape of the gas; but in order to retard the escape ofthe gas I use in connection with, and as a practical part of theapparatus, a jacket 6 which is wide enough to cover all the holes in thecylinder and is preferably long enough to wrap around the cylinder twoor more times. This jacket is wrapped tightly around the cylinder asshown, and is preferably securely fastened in place by suitable devices,a convenient means being tapes 6 which are wrapped cries-cross aroundthe jacket and tied so as to retain the jacket securely in place.

When it is desired to use the device the plunger is adjusted to thedesired position and fastened by screw 0; the cylinder is wrapped withinthe jacket and screwed onto the outlet f of a liquid carbon dioxidcontainer, as indicated in the drawings; the container valve is thenpartly opened to permit the vaporized li uld carbon dioxid gas to escapeinto the cylinder at; the gasis ordinarily at a temperature of fromminus 60 to minus 90 degrees centigrade; and can escape only very slowlyfrom the cylinder through the perforations a, and the surrounding jacketand rapidly cools the cylinder. The gas is also precipitated orcondensed in the cylinder in the form of-crystals, like frost or snow;and when the con- I tainer valve is fullyopened-the outflowing C valveat the base of the nipple.

Q est-race gas comes into contact with the layer of snow or crystallizedcarbon dioxid already formed in the cylinder and more gas is rapidlycondensed 1n the cylinder in the form of crys tals, until a stick ofsnow-like carbon dioxid is formed.

The plunger is set according to the length of the stick of snow desired;thus if two inches are Wanted the stem is locked when the mark 2 on thescale numbers is at the outer edge of cap 0. The stick of snow can becondensed by loosening the thumb-screw and pushing the plunger as far inas it Will go, which compresses the snow against the Then the plunger isbrought back to place and the pressure of gas forces the stick of snowout wardly in the cylinder and more crystals are formed until the spacein the cylinder is solidly filled; then the tank val e is closed, thedevice unscrewed from the tank nipple, and the stick of carbon dioxidcrystal ejected from the cylinder by the plunger. I also propose to makecondensers and molds with cylinders inch in internal diameter, in whichcase I shall provide them With thirtytwo holes instead of sixteen. It isobvious that variations may be made in the form and construction of thedevice within the scope of the invention, the essential object 01": myinvention being to condense carbon dioxid gas as drawn from a liquid gastank into snow and mold it into practical form.

Having described my invention What I claim as new and desire to secureby Letters Patent thereon is:

1. A condenser and mold for liquid carbon dioxid comprising a cylinderadapted to be connected to the outlet of a liquid carbon C: dioxidcontainer, an adjustable plunger in said cylinder, and means to retardthe escape of the gas from the cylinder.

2. A condenser and mold for liquid carbon dioxid, comprising aperforated cylinder adapted to be connected to the outlet of a carbondioxid container, an adjustable plunger in said c linder, and a flexiblewrapper tor the cylin er adapted to retard the escape of gas therefrom.

3. A carbon dioxid condenser and mold comprising a cylinder having a capon one end and an internally threaded flange on the other end whereby itmay be connected to a liquid carbon dioxid supply, an adjustable plungerin said cylinder, and means for retarding the escape of gas from thecylinder.

i. A carbon dioXid condenser and mold comprisin a cylinder adapted to beattached to the outet of a liquid carbon dioxid container, an adjustableplunger in Said cylinder, a graduated stem connected With said plunger,and means for retarding the escape of gas from the cylinder.

5. A carbon dioxid condenser and mold comprising a perforated cylinderadapted to be attached to the outlet of a liquid carbon dioxidcontainer, an adjustable plunger in said cylinder, and a fibrous jacketadapted to bb wrapped around the cylinder to prevent too rapid escape ofthe gas therefrom.

(5. A carbon dioxid condenser and mold comprising a perforated cylinderhaving a cap on one end, an internally threaded flange on the other endwhereby it may be attached to the outlet of a liquid carbon dioxidcontainer, an adjustable plunger in said cylinder, a stem connected withsaid plunger, and a fibrous jacket adapted to be wrapped around thecylinder to prevent too rapid escape of the gas therefrom.

In testimony that I claim the foregoing as my own, I allix my signaturein presence of two witnesses.

WILLIAM .lA M ES FLEMh/HNG.

\Vitnesses:

FRANK S. Hannow, J. EDWARD MAoDnnr ioau.

